Reinforced inner tube for pneumatic tires.



P. H. HALL. REINFORCED INNER TUBE FOR PNEUMATIC TIRES.

APPLICATION FILED SEPT.9,'1910.

Patented J an. 9, :1912.

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APPLIOATIOH FILED SBPTIQ, 1910.

am a .nw gm m R. E]. WWW M A w my L w w orurno srArEs PATENT orrion FREDERICK HAROLD HALL, OF NORTON LTNDSEY, ENGLAND.

REINFORCED INNER TUBE FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Janie, 1912.

Application filed September 9, 1910. Serial No. 581,244.

To all whom it may concern Be it known that I, FREDERICK HALL, a subject of the King of Great Britain, residing at Ganna Way Gate, Norton Lindsey, Warwickshire, England, have invented certainnew and useful Improvements in Reinforced Inner Tubes for Pneumatic Tires, of which the following is" a specification.

This invention relates to reinforced inner tubes for pneumatic tires in which one or more layers of strong fabric or canvas are.

embedded in or combined with the rubber of-tlie tube so as to enhance thestrength of the latter and acts as a support for the walls thereof, thus preventing bursting or undue ex ansion in the event of the outer cover being cut or otherwise damaged.

' The invention relates more particularly to reinforced tubes of? the type wherein the walls include or are combined with *a continuous or endless band or layer. of fabric which completely encircles the tube and is adapted to expand therewith up to a certain limit so as to then act as'a check to prevent over-distention.

The primary ob]ect offthe present invention is to provide an improved and moreeflicient form of tube of the: type mentioned which enables it to be'manufactured readily and economically.

Figure 1 of the accompanying drawings represents a cross-section of a reinforced inner tube made in accordance with'one form of this invention. Fig. 2 is a longitu dinal horizontal section on line m Fig. 1. Fig. 3 shows the said tube when partially distended, and Fig. 4 represents a transverse section of a modified form of tube the drawings.

having a single hollow ridge.

The same letters of reference indicate corresponding parts in each of the figures of Figs. 1 to 4,'the tube 1 is Referring to and is reinof circular section externally,

" forced by a band of canvas or other suitable fabric 2., This reinforcing band, which may bein one or more l ayers,.and either woven endless or overlapped is embedded within the rubber of the walls as shown, and passes right around the tube so as to completely encircle it, leaving no part unprotected. 0 allow of expansion of the tube the said band 2 is made of greater transverse circumfer- HAROLD v ential length than that of the center line of the,walls of the deflated tube, and near and the plaited parts, 3, 4, of the band 2 extend or unfold or pay themselves out,

with the said walls, as'shown in Fig. 3, until the band attains the she e of .a complete circle,which is the limit 0 expansion, when it acts as a positive check pension is taking place the ridges 5, 6, also extend transversely and assume a flattened t for preventing over distention ofthe tube. While this, ex-' form. The tube ispreferably made from two sheets of rubber, one applied. to the out side of the canvas and the other to the in-.

'side (or the canvas applied to the outside of this inner sheet) the plaits'or folds of said canvas being subsequently filled in with L rubber to form the solid ridges, 5, 6.

Instead of the canvas 2 being plaited at two points as described, only a single plait f 3 maybe employed, as shown in .Fig. 4, this plait being arranged centrally around the my other suitable It is embedded in the.single central inner circumference, or at point. ridge 5, which, to allow of expansion with a comparatively low air pressure, is madehollow or provided with a circumferential hole 7 so reducing the effective thickness.

This form of tube is particularly applicable for use with motor cycles.

Having fully described my invention what I desire to claim and secure by Letters Pat ent is 1. A reinforced inner tube for pneumatic. tires the walls of which are combined with a continuous encircling band of fabric which is plaited,circumferentially, said plaitofthe' fabric contained within and filled by a thickened ridge of rubber which conforms to the shape of theplait.

- 2. A reinforced inner tube for pneumatic tires having a wall and ii continuous encireling band of f.bric embedded in said wall and plaited circumferentially, the portion of thewall inclosing the plaited portion of the fabric being ribbed internally to conform to such piaited portion of the fabric.

3.'A reinforced inner tube for pneumatic 5 tires having a' Wall and a continuous band .of fabric embedded in said wall, such fabric being plaited circumferentially and the Wall Of the tube having a ridge-which incioses end conforms to the shape of theplait of lothe febrie such plait and ridge projecting into the interior of the tube'while the latter isdefiated and projecting to the exterior of the tube when the latter is inflated.

In testimony whereof I- have hereunto setmy hand in presenceof twosubscribing wit- 15 nesses. j

' FREDERICK HAROLD HALL.

Witnesses: v

HY. SKERRE'I'T, v HENRY NORTON SKERRETI. 

